Steam-governor



L. dAURIA. 4 Steam Governor.

Patehted July 27, 1-880.

UNITE STATES.

LUIGI DAUB IA, OF PHILADELPHIA, PENNSYLVANIA.

STEAM-GOVERNOR.

SPECIFICATION formingpart of Letters Patent No. 230,519, dated July 27, 1880. Application filed January 16, 1880.

To all whom it may concern:

Be it known that I, LUIGI DAURIA, a subject of the King of Italy, and residing in Philadelphia, Pennsylvania, 3727 Locust street, have invented a new and useful Improvement in Steam-Governors, which improvement is fully set forth in the following specification and accompanying drawings. 2

The object of my invention is to furnish an isochronous centrifugal governor for steamengines, in accomplishing which the governorarm itself is used as the throttle-valve, the valvechamber being attached to the spindle or axis of the governor and made to revolve in a steamspace formed in the supply or delivery pipe, which constitutes the steam-chamber of the governor.

Figure 1 is a vertical section through the governor, showing all its parts, the governor arm or throttle-valve and the valve-chamber being in side view. Fig. 2 is a side view of those two parts taken at right angles to that shown in Fig. 1. Fig. 3 is avertical section of the same parts through the axis of rotation. Fig.4 represents a horizontal section through the governor-arm and valve-chamber, showing the ports ofthe latter, as also through the steamchamber. Figs. 5 and 6 represent, respectively, a modification of what is represented in Figs. 2 and 3.

The same letters of reference refer tothe same parts in all the views.

A is the steam-chamber, in which the governor-arm or throttle-valve revolves together with the valve-ch amber.

B B is the governor-arm or throttle-valve, which consists of two equal pieces, B B, kept apart and parallel to each other internally by two bridgebars, G D. g

E is the valve-chamber, formed in the governor spindle or axis H, provided with two parallel flat sides, F F, in which are bored two ports, S S, of equal area, facing each other.

The spindle or axis H projects from the steamchamber A through a stufling-box, and to it is attached the gear by which the motion is imparted to the governor.

The interior part of the valve-chamber E is adjusted with the eduction-passage P of the steamchamber,so as to form with it a practically tight steam-joint. This can be accomplished in two ways-by lengthening the valve-chamber with a cylindrical tube, K, which is made to run in the eduction-passage P, as shown in the accompanying drawings, or by lengthening said passage P with a cylindrical stationary tube, which projects from the steam-chamber internally and fits the valve-chamber E.

The governor-valve B B is hung on the back of the valve-chamber E by a knife-edge suspension, 1, the knife-edge being made by the bridge-bar 0. (Any other kind of suspension may be used instead of it, as center-pins, chainsuspension, 860.) The lateral pieces B B of the governor-valve form a practically tight steamjoint with the parallel flat sides F F of the against these sides, and as they swing in a vertical plane they are quite free of friction. Said pieces B B are provided with ports, which, when the governor is at rest or at its lower position, correspond exactly with the ports S S of the ValVechamber. The rising of the governor-valve B B is limited, so as to'cover the ports S S when at its higher position without lost motion.

The center of gravity of the governor-valve B B is situated at one side and the suspension at the other of the geometrical axis of rotation, and it can be demonstrated by a mathematical argument discovered by myself that this disposition, when properly made, enables the closest approximation to isochronism.

The following is the action of the described governor The steam from the boiler enters the steam-chamber A through the opening Q in a tangential direction, and nearly to the bottom of said chamber A, without striking against the revolving valve-chamber E and governor- .arm B B. After flowing through the ports S S of the valve-chamber, (when opened,) it passes in the eductionpassage P, which communicates with the engine. The governorvalve B B being in equilibrium at only one speed of the engine when in motion, the smallest variation of velocity makes it oscillate on the ports S S of the valve-chamber E. Thus it will strictly govern the supply of steam to keep the engine with uniform velocity.

1 have provided the lateral pieces B B of the valve-chamber E, but without absolute contact governor or throttle valve with ports to make it quite balanced under the flow of steam passing from the steam-chamber A into the valvechamber E. Without such precaution the governor-arm will rise independently of its contrifugal force.

The governor-arm can be used as athrottlevalve, as shown in Figs. 5 and 6, which can be considered as substituting Figs. 2 and 3, respectively.

In Figs. 5 and 6 the valve V is suspended within the hollow spindle of the governor, and acts inside of the valve-chamber Z as an ordinary throttle-valve. The steam enters the valve-chamber Z through the port T. This valve-chamber Z is also attached to the governor spindle or axis H and adjusted with 'the steam-charm her A in the same manner, as before described for Figs. 1, 2, and 3.

It can be easily understood without special illustration that the governor-arm could be used also to communicate motion to a throttle-valve, both being disposed within the steamchamber. This arrangement has no advantage over that described in the accompanying drawings, which is decidedly preferable for its simplicity.

What I claim as my invention, and desire to secure by Letters Patent, is

1. A centrifugal governor in which the governor-arm or conical pendulum is used as the throttle-valve,'the valve-chamber being formed in the spindle or axis of the governor itself, and being adjusted with a steam-chamber formed in the supply or delivery pipe, so that the steam from the boiler is delivered to the engine only through the port or ports of said valve-chamber, substantially as set forth.

2. The combination of the governor-arm, conical pendulum, or throttle-valve B B with the valve-chain ber E, spindle or axis H, tube K, and steam-chamber A, substantially as shown and described.

LUIGI DAURIA.

Witnesses:

B. F. MOORE, THOS. J. MURRAY. 

